Enable resourceurls

src/vs/workbench/browser/dnd.ts

@@ -33,6 +33,7 @@ import { parse, stringify } from 'vs/base/common/marshalling';
 import { ILabelService } from 'vs/platform/label/common/label';
 import { IWorkspaceContextService } from 'vs/platform/workspace/common/workspace';
 import { withNullAsUndefined } from 'vs/base/common/types';
+import { ITreeDataTransfer } from 'vs/workbench/common/views';
 
 //#region Editor / Resources DND
 
@@ -46,6 +47,11 @@ export class DraggedEditorGroupIdentifier {
 	constructor(readonly identifier: GroupIdentifier) { }
 }
 
+export class DraggedExtensionTreeItemsIdentifier {
+
+	constructor(readonly identifier: string) { }
+}
+
 export const CodeDataTransfers = {
 	EDITORS: 'CodeEditors',
 	FILES: 'CodeFiles'
@@ -130,6 +136,28 @@ export function extractEditorsDropData(e: DragEvent): Array<IDraggedResourceEdit
 	return editors;
 }
 
+export async function extractTreeDropData(dataTransfer: ITreeDataTransfer): Promise<Array<IDraggedResourceEditorInput>> {
+	const editors: IDraggedResourceEditorInput[] = [];
+	// Data Transfer: Resources
+	const resourcesKey = DataTransfers.RESOURCES.toLowerCase();
+	if (dataTransfer.has(resourcesKey)) {
+		try {
+			const rawResourcesData = await dataTransfer.get(resourcesKey)?.asString();
+			if (rawResourcesData) {
+				const rawResourceList = JSON.parse(rawResourcesData);
+				for (const resourceRaw of rawResourceList) {
+					if (resourceRaw.indexOf(':') > 0) { // mitigate https://github.com/microsoft/vscode/issues/124946
+						editors.push({ resource: URI.parse(resourceRaw) });
+					}
+				}
+			}
+		} catch (error) {
+			// Invalid transfer
+		}
+	}
+	return editors;
+}
+
 export interface IFileDropData {
 	name: string;
 	data: VSBuffer;
@@ -195,8 +223,8 @@ export class ResourcesDropHandler {
 	) {
 	}
 
-	async handleDrop(event: DragEvent, resolveTargetGroup: () => IEditorGroup | undefined, afterDrop: (targetGroup: IEditorGroup | undefined) => void, targetIndex?: number): Promise<void> {
-		const editors = extractEditorsDropData(event);
+	async handleDrop(event: DragEvent | ITreeDataTransfer, resolveTargetGroup: () => IEditorGroup | undefined, afterDrop: (targetGroup: IEditorGroup | undefined) => void, targetIndex?: number): Promise<void> {
+		const editors = event instanceof DragEvent ? extractEditorsDropData(event) : await extractTreeDropData(event);
 		if (!editors.length) {
 			return;
 		}

src/vs/workbench/browser/parts/editor/editorDropTarget.ts

@@ -4,7 +4,7 @@
  *--------------------------------------------------------------------------------------------*/
 
 import 'vs/css!./media/editordroptarget';
-import { LocalSelectionTransfer, DraggedEditorIdentifier, ResourcesDropHandler, DraggedEditorGroupIdentifier, DragAndDropObserver, containsDragType, CodeDataTransfers, extractFilesDropData } from 'vs/workbench/browser/dnd';
+import { LocalSelectionTransfer, DraggedEditorIdentifier, ResourcesDropHandler, DraggedEditorGroupIdentifier, DragAndDropObserver, containsDragType, CodeDataTransfers, extractFilesDropData, DraggedExtensionTreeItemsIdentifier } from 'vs/workbench/browser/dnd';
 import { addDisposableListener, EventType, EventHelper, isAncestor } from 'vs/base/browser/dom';
 import { IEditorGroupsAccessor, IEditorGroupView, fillActiveEditorViewState } from 'vs/workbench/browser/parts/editor/editor';
 import { EDITOR_DRAG_AND_DROP_BACKGROUND } from 'vs/workbench/common/theme';
@@ -21,6 +21,8 @@ import { IEditorService } from 'vs/workbench/services/editor/common/editorServic
 import { assertIsDefined, assertAllDefined } from 'vs/base/common/types';
 import { Schemas } from 'vs/base/common/network';
 import { URI } from 'vs/base/common/uri';
+import { ITreeViewsDragAndDropService } from 'vs/workbench/services/views/common/treeViewsDragAndDropService';
+import { ITreeDataTransfer } from 'vs/workbench/common/views';
 
 interface IDropOperation {
 	splitDirection?: GroupDirection;
@@ -40,14 +42,16 @@ class DropOverlay extends Themable {
 
 	private readonly editorTransfer = LocalSelectionTransfer.getInstance<DraggedEditorIdentifier>();
 	private readonly groupTransfer = LocalSelectionTransfer.getInstance<DraggedEditorGroupIdentifier>();
+	private readonly treeItemsTransfer = LocalSelectionTransfer.getInstance<DraggedExtensionTreeItemsIdentifier>();
 
 	constructor(
 		private accessor: IEditorGroupsAccessor,
 		private groupView: IEditorGroupView,
 		@IThemeService themeService: IThemeService,
 		@IInstantiationService private instantiationService: IInstantiationService,
 		@IEditorService private readonly editorService: IEditorService,
-		@IEditorGroupsService private readonly editorGroupService: IEditorGroupsService
+		@IEditorGroupsService private readonly editorGroupService: IEditorGroupsService,
+		@ITreeViewsDragAndDropService private readonly treeViewsDragAndDropService: ITreeViewsDragAndDropService<ITreeDataTransfer>
 	) {
 		super(themeService);
 
@@ -292,6 +296,24 @@ class DropOverlay extends Themable {
 			}
 		}
 
+		// Check for tree items
+		else if (this.treeItemsTransfer.hasData(DraggedExtensionTreeItemsIdentifier.prototype)) {
+			const data = this.treeItemsTransfer.getData(DraggedExtensionTreeItemsIdentifier.prototype);
+			if (Array.isArray(data)) {
+				const treeData = Promise.all(
+					data.map(id => this.treeViewsDragAndDropService.removeDragOperationTransfer(id.identifier)));
+				treeData.then(dataTransferItems => {
+					const dropHandler = this.instantiationService.createInstance(ResourcesDropHandler, { allowWorkspaceOpen: true /* open workspace instead of file if dropped */ });
+					dataTransferItems.forEach(dataTransferItem => {
+						if (dataTransferItem) {
+							dropHandler.handleDrop(dataTransferItem, () => ensureTargetGroup(), targetGroup => targetGroup?.focus());
+						}
+					});
+				});
+			}
+			this.treeItemsTransfer.clearData(DraggedExtensionTreeItemsIdentifier.prototype);
+		}
+
 		// Web: check for file transfer
 		else if (isWeb && containsDragType(event, DataTransfers.FILES)) {
 			let targetGroup: IEditorGroupView | undefined = undefined;

src/vs/workbench/browser/parts/views/treeView.ts

@@ -57,7 +57,7 @@ import { CancellationToken, CancellationTokenSource } from 'vs/base/common/cance
 import { Command } from 'vs/editor/common/languages';
 import { isCancellationError } from 'vs/base/common/errors';
 import { ElementsDragAndDropData } from 'vs/base/browser/ui/list/listView';
-import { CodeDataTransfers, fillEditorsDragData } from 'vs/workbench/browser/dnd';
+import { CodeDataTransfers, DraggedExtensionTreeItemsIdentifier, fillEditorsDragData, LocalSelectionTransfer } from 'vs/workbench/browser/dnd';
 import { Schemas } from 'vs/base/common/network';
 import { ITreeViewsDragAndDropService } from 'vs/workbench/services/views/common/treeViewsDragAndDropService';
 import { generateUuid } from 'vs/base/common/uuid';
@@ -1241,6 +1241,8 @@ const TREE_DRAG_UUID_MIME = 'tree-dnd';
 
 export class CustomTreeViewDragAndDrop implements ITreeDragAndDrop<ITreeItem> {
 	private readonly treeMimeType: string;
+	private readonly treeItemsTransfer = LocalSelectionTransfer.getInstance<DraggedExtensionTreeItemsIdentifier>();
+
 	constructor(
 		private readonly treeId: string,
 		@ILabelService private readonly labelService: ILabelService,
@@ -1262,6 +1264,7 @@ export class CustomTreeViewDragAndDrop implements ITreeDragAndDrop<ITreeItem> {
 		const uuid = generateUuid();
 		this.treeViewsDragAndDropService.addDragOperationTransfer(uuid, this.dndController.handleDrag(itemHandles, uuid));
 		originalEvent.dataTransfer.setData(TREE_DRAG_UUID_MIME, uuid);
+		this.treeItemsTransfer.setData([new DraggedExtensionTreeItemsIdentifier(uuid)], DraggedExtensionTreeItemsIdentifier.prototype);
 	}
 
 	private addResourceInfoToTransfer(originalEvent: DragEvent, resources: URI[]) {

src/vscode-dts/vscode.proposed.treeViewDragAndDrop.d.ts

@@ -102,6 +102,9 @@ declare module 'vscode' {
 		 * When the items are dropped on **another tree item** in **the same tree**, your `TreeDataTransferItem` objects
 		 * will be preserved. See the documentation for `TreeDataTransferItem` for how best to take advantage of this.
 		 *
+		 * To add a data transfer item that can be dragged into the editor, use the application specific mime type "resourceurls".
+		 * The data for "resourceurls" should be an array of `toString()`ed Uris. 
+		 *
 		 * The returned `TreeDataTransfer` will be merged with the original`TreeDataTransfer` for the operation.
 		 *
 		 * @param source The source items for the drag and drop operation.